한국지반공학회논문집 (Journal of the Korean Geotechnical Society)

  • 제38권1호
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  • Pages.35-45
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  • 2022
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  • 1229-2427(pISSN)
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  • 2288-646X(eISSN)
한국지반공학회 (Korean Geotechnical Society)
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원심모형실험을 통한 원형 수직구 굴착 중 발생하는 지반 변형 평가

Evaluation of Ground Deformation during Excavation of Vertical Shaft through Centrifuge Model Test

  • 김준영 (한남대학교 스마트융합공학부)
  • Kim, Joonyoung (Disivion of Smart Interdiscplinary Engrg., Hannam Univ.)
  • 투고 : 2021.12.20
  • 심사 : 2021.12.30
  • 발행 : 2022.01.31
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초록

개착공법으로 원형 수직구 건설 시, 가시설 흙막이 벽체는 일정 수준의 변위를 허용하는 연성벽체로 설계된다. 합리적이고 경제적인 연성벽체의 구조 설계를 위해서는 벽체에 작용하는 토압을 정확히 평가할 필요가 있다. 원형 수직구 벽체에 작용하는 토압은 주변 지반의 소성 변형과 밀접하게 연관되어 있으나, 이에 대한 연구는 부족한 상황이다. 본 연구는 원형 수직구의 단계 굴착을 원심모형시험을 통해 모사하고, 원심모형시험 중 촬영된 이미지에 이미지 해석 기법을 적용하여 원형 수직구 굴착 시 주변 지반에 발생하는 변형을 평가하였다.

When constructing a cylindrical vertical shaft through the open-cut method, the walls are generally designed to be temporary flexible walls that allow a certain level of displacement. The earth pressure applied to the flexible walls acts as an external force and its accurate estimation is essential for reasonable and economical structure design. The earth pressure applied to the flexible wall is closely interrelated to the plastic deformation of the surrounding ground. This study simulated a stepwise excavation for constructing a cylindrical vertical shaft through a centrifugal model test and evaluated the continuous deformation behaviors of the surrounding ground through digital image analysis.

키워드

과제정보

이 논문은 2021학년도 한남대학교 학술연구비 지원에 의하여 연구되었음.

참고문헌

  1. Alshibli, K. A., Batiste, S. N., and Sture, S. (2003), "Strain Localization in Sand: Plane Strain Versus Triaxial Compression", Journal of Geotechnical and Geoenvironmental Engineering, Vol.129, No.6, pp.483-494. https://doi.org/10.1061/(ASCE)1090-0241(2003)129:6(483)
  2. Beresantsev, V. G. (1958), "Earth Pressure on the Cylindrical Retaining Walls", International Conference on Earth Pressure Problem, pp.21-27.
  3. Hossain, M. S. and Randolph, M. F. (2010), "Deep-penetrating Spudcan Foundations on Layered Clays: Centrifuge Tests", Geotechnique, Vol.60, No.3, pp.157-170. https://doi.org/10.1680/geot.8.P.039
  4. Idinger, G., Aklik, P., Wu, W., and Borja, R. I. (2011), "Centrifuge Model Test on the Face Stability of Shallow Tunnel", Acta Geotechnica, Vol.6, No.2, pp.105-117. https://doi.org/10.1007/s11440-011-0139-2
  5. Kim, D. H., Lee, D. S., Kim, K. R., Lee, Y. H., and Lee, I. M. (2009), "Earth Pressures Acting on Vertical Circular Shafts Considering Arching Effects in c-ϕ soils: I. Theory", Journal of Korean Tunnelling and Underground Space Association, Vol.11, No.2, pp.117-129. https://doi.org/10.9711/KTAJ.2009.11.2.117
  6. Kim, K. Y., Lee, D. S., Cho, J., Jeong, S. S., and Lee, S. (2013), "The Effect of Arching Pressure on a Vertical Circular Shaft", Tunnelling and underground space technology, Vol.37, pp.10-21. https://doi.org/10.1016/j.tust.2013.03.001
  7. Kwak, T. Y., Park, K. H., Kim, J., Chung, C. K., and Baek, S. H. (2020), "Shear Band Characterization of Clayey Soils with Particle Image Velocimetry", Applied Sciences, Vol.10, No.3, p.1139. https://doi.org/10.3390/app10031139
  8. Lee, I. M., Moon, H. P., Lee, D. S., Kim, K. R., and Cho, M. S. (2007), "Earth Pressure of Vertical Shaft Considering Arching Effect in Layered Soils", Journal of Korean Tunnelling and Underground Space Association, Vol.9, No.1, pp.49-62.
  9. Lee, I. M., Kim, D. H., Cha, M. H., Lee, D. S., and Kim, K. R. (2010), "Earth Pressures Acting on Vertical Circular Shafts Considering Arching Effects in c-ϕ Soils: II. Lab. Model Tests", Journal of Korean Tunnelling and Underground Space Association, Vol.12, No.2, pp.129-144. https://doi.org/10.9711/KTAJ.2010.12.2.129
  10. Prater, E. G. (1977), "An Examination of Some Theories of Earth Pressure on Shaft Linings", Canadian Geotechnical Journal, Vol.14, No.1, pp.91-106. https://doi.org/10.1139/t77-007
  11. Rankine, W. J. M. (1857), II. On the stability of loose earth. Philosophical transactions of the Royal Society of London, (147), 9-27.
  12. Shin, Y. W. (2004), Earth pressure acting on the cylindrical retaining wall of a shaft in cohesionless soils, PhD thesis, Hanyang University, South Korea.
  13. Shin, Y. W. and SaGong, M. (2007), "A Rational Estimating Method of the Earth Pressure on a Shaft Wall Considering the Shape Ratio", Journal of Korean Tunnelling and Underground Space Association, Vol.9, No.2, pp.143-155.
  14. Shin, Y., Moon, K., Kang, H., and Lee, S. (2008), "Investigation of Earth Pressure on Vertical Shaft by Field Monitoring", Journal of the Korean Geoenvironmental Society, Vol.9, No.4, pp.63-76.
  15. Stanier, S.A., Blaber, J., Take, W.A., and White, D.J. (2015), "Improved Image-based Deformation Measurement for Geotechnical Applications", Canadian Geotechnical Journal, doi: 10.1139/cgj2015-0253.
  16. Terzaghi, K. (1943), Theoretical soil mechanics, John Wiley and Sons, pp.202-215.
  17. White, D., Randolph, M., and Thompson, B. (2005), "An Imagebased Deformation Measurement System for the Geotechnical Centrifuge", International Journal of Physical Modelling in Geotechnics, Vol.5, No.3, pp.1-12.
  18. Wong, R. C. K. and Kaiser, P. K. (1988), "Behaviour of Vertical Shafts: Reevaluation of Model Test Results and Evaluation of Field Measurements", Canadian Geotechnical Journal, Vol.25, No.2, pp.338-352. https://doi.org/10.1139/t88-035